Great camera - already have an A9 and got this as needed 2 bodies and this was a great price with warranty and supposed better AF and sealing and speed. Better grip and ergonomics. Not had chance to fully test yet under lockdown and compare vs original but welcome better sealing and apparently better AF. Key feature I like is much faster scan rate to reduce rolling shutter issues shooting fast action with electronic shutter. Also really like the left hand dial (coming from a Fuji X system). Don’t need to delve into menus like many people criticise once set up properly (refer to Mark Galer videos). Much better high iso performance especially for low light sport comparing to my old XT3, EM1ii and 2.8 lenses. Only thing I sometimes miss is portability of the small Fuji primes compared to Sony primes which are bigger. Lens quality of GM is fantastic especially 135 1.8 and 70-200 2.8 so consideration.of lens cost and size is important if moving to the system. My main reason for moving to Sony from Fuji and Olympus was just shooting fast indoor swimming usually in poor lighting. If shooting static and good light then not sure ifI would have changed.